DoubleSlider is a slider with two thumbs and can be used with REALbasic 5.0 and higher on a composite window. You can set each thumb up or down, and left or right, depending on the orientation of the double slider. Note that in design time (IDE) the control is also composite aware.
What's new in DoubleSlider
Version 2.0.1: Release notes were unavailable when this listing was updated.